Disk harrow and scraper control mechanism



' April 1953 -w. P. OEHLER ET AL 2,635,522

DISK HARROW AND SCRAPER CONTROL MECHANISM Original Filed Sept. 15, 1947 1 INVENTORS WIL MP.OEHLE Patented Apr. 21, 1953 .v o I 2,635,522

DISK HARROW AND SCRAPERIv CONTROL MECHANISM William P. Oehler and Charles H. Youngberg, Moline, Ill., assignors to Deere & Company, Moline, 111., a corporation of Illinois Original application September 15, 1947, Serial Divided and this application November 19, 1949, Serial No. 128,328

6 Claims. (Cl. 97-224) This application is a division of our co-pending application, Serial No. 774,040, filed Sep-' tember 15, 1947. i

, The object and general nature of the present invention is the provision of a disk harrow having a new and improved control for the disk scrapers, wherein the scrapers may optionally be set for operating in a given position or be arranged for manual oscillation, as desired.

These and other objects and advantages of the present invention will be apparent to those skilled in the art after a consideration of the following detailed description, taken in conjunction with the accompanying drawings, in which Figure 1 is an enlarged perspective view of a portion of the disk gang of a disk harrow, in which the principles of the. presentv invention have been incorporated, Figure 1 showing the preferred means for holding the scrapers in a generally fixed position of adjustment.

Figure 2 is a sectional view taken generally along the line I--I0 of Figure 1.

Figure 3 is an enlarged fragmentary perspective view, showing the scraper control means equipped optionally with a lever for changing the position of the scrapers, when desired.

Figure 4 is a sectional view taken generally along the line I2I2 of Figure 3.

In the disk harrow of the preferred construetion, each of the front and rear gangs includes a plurality of disks 5 mounted in a gang frame or scraper-supporting frame 8, and each of the latter includes a bar I3!) formed into generally.

rectangular configuration with rounded end portions I3I. A reenforcing bar I32 connects the inner and outer ends of each frame and crossbars I33 connect the front and rear side sections of the frame. At the laterally outer end of each of the scraper frames 8, the adjacent crossbar I33 is welded to the upper end of a gang frame standard I31, and a similar standard is Welded at its upper end to the inner end of the frame. The lower end of each standard I31 is connected with the draft structure for the harrow and is also connected with the associated bearing means in which the gang of disks is rotatably disposed.

As best shown .in Figure 1, an oscillatablescraper clamps I14, each having a blade-receiv-' ing section and a shaft-receiving section andfirmly. clamped to the companion member by a clamping bolt I15. Each of the scraper shafts is mounted in a pair of brackets I11 secured to' the rear side of the gang frame by bolt means I18, each shaft I10 being supported in the brack--- et I11 by suitable bushings or the like. Each shaft I10 also carries a torsion spring I8I having one end I82 bearing against an adjacent portion of the frame and the other end I83 bear- 1- ing against the adjacent scraper blade clamp I13, whereby the spring I8I serves not only to hold the scraper blades against the faces of theassociated disks but also tends to rock the asso,-* ciated shaft I10 in such a direction as to carry the scraper blades radially inwardly'of the disks;

Under some conditions it may be desirable to manually rock the scraper shafts I10 so asvto; shift the lower ends of the scraper blades I12- radially outwardly, but not beyond the edges of the associated disks, for the purpose of clearing away trash and the like, but under most conditions it is not'necessary to oscillate the scraper shafts I10 although it is desirable to be able todispose thelower ends of the scraper blades I12 in the desired position radially of the associated disks. In order to provide a new and improved scraper controlling linkage to accommodatevthe, above mentioned two conditoins, we have provided the following scraper control means.

Referring first to Figure 1, one of the scraper blade clamping members, such as the one in-=' dicated by the reference numeral I14 in'Figure 1, is provided with an upper or arm extension I9I that isprovided'with a tapped opening I92; A member pref' and an abutment section I93. erably in the form of a clip or plate I95 is 'provided with a relatively deep notch I96 dimen sioned and angled so that the clip or plate I95 engages over the edge of the rear bar on theassociated gang, frame. The clip or plate I95 is also provided with a longitudinally extending slot I91. the position of the scraper'blades I12 radially of the disks, but not to oscillate the blades, we prothe arm I9I.

20I is loose in the slot I91. Then the bolt 24H is tightened by turning the same farther into Where it is desired to be able to adjust the arm I9I, thus firmly and rigidly clamping the latter to the plate I95 and thereby holding the arm in a given position relative to the frame 8. A lock nut 205 is threaded onto the opposite end of the bolt 20I while retaining the desired adjustment. The scrapers may be readjusted at any time merely by loosening the lock nut 205 and then loosening the bolt 20I in the arm ISI to permit the bolt to be shifted to a new position in the slot I91, whereupon the clutch may then be tightened to retain the new adjustment. Thus, the plate I95 serves as stop means carried by the rear bar of the associated gang frame for preventing movement, when the bolt MI and nut 205 are tightened, of the scraper blade shaft When it is desired to arrange the disk harrow for oscillating the scraper shafts I whenever desired, we supply an oscillating lever 2I0 for each shaft I'I0. As best shown in Figure 3, each lever H0 is provided at its lower end with a V- shaped notch 2H and an opening M2 to permit the lever to be mounted on the threaded end of the bolt MI. The upper end of each lever 2I0 has an opening 2I3 to receive a cable or other element 2H that may extend to the operator's position on the tractor. Where the levers 2|0 are to be used, and before mounting the levers on the bolts 20I, each of the latter is loosened in its associated scraper arm I9I so that the bolt is freed for movement in the associated slot I91. Then with the bolt 20I in its loosened condition, the lever 2I0 is mounted, as shown in Figure 3, and then the lock nut 205 may be applied for firmly holding the lever 2I0 against the scraper arm I9 I. Arranged in this manner, with the springs I8I holding the scraper blades in their forward position, whenever it is desired to move the lower ends of the scraper blades rearwardly, all that the operator has to do is to pull on the cables 2I4. For the larger disks, the engagement of the abutment sections I93 on the arms I9I with the adjacent portion of the scraper frame serves to limit the outward movement of the lower ends of the scraper blades. However, where smaller disks may be used, we provide each of the clips or plates I95 with an opening 2I'I therein to receive a cotter 2 I8, which is disposed rearwardly of the frame such a distance that when the lever 2I0 is pulled forwardly, the engagement of the lug I93 with its associated cotter serves to prevent the lower ends of the scraper blades from being swung outwardly beyond the edges of the associated disks.

While we have shown and described above the preferred structure in which the principles of the present invention have been incorporated, it is to be understood that our invention is not to be limited to the exact details shown and described herein, but that, in fact, widely different means may be employed in the practice of the broader aspects of our invention.

What we claim, therefore, and desire to secure by Letters Patent is:

1. In a disk harrow including a frame, a gang of disks journaled thereon and a scraper shaft rockably mounted on said frame, a lever for rocking said shaft, stop means carried by said frame and having spaced apart abutment portions, 9. part connected to move with said shaft and movable generally alongside said stop means, means carried by said part and engageable by said lever for detachably connecting the latter to said part in fixed relation thereto, whereby movement of said lever serves to rock said shaft,

said means being engageable with the spaced apart abutment portions of said stop means for limiting the amount of rocking that can be imparted to said shaft by operation of said lever, and means carried by said part and adapted to engage said stop means, said last named partcarried means adapted, when tightened, to lock said part to said stop means, whereby said shaft is held against rocking movement.

2. In a disk harrow having a frame, a scraper shaft rockably mounted thereon, and scrapers carried by said shaft, an arm on said shaft, a slotted plate carried by said frame in a position transversely of said shaft and with the slotted portion thereof disposed alongside the path of movement of said arm when said shaft is rocked, and bolt means carried by said arm in transverse relation with respect to the latter and extending through the slot in said plate, said bolt means when tightened fixing said arm in different optional positions relative to said slot, the latter being longer than the diameter of said bolt means, whereby said arm is held against movement relative to said frame for holding said scrapers in different optional positions.

3. In a disk harrow having a frame, a scraper shaft rockably mounted thereon, and scrapers carried by said shaft, a slotted plate carried by said frame, an arm on said shaft, said arm having a tapped opening therein, a bolt having its threaded end extending through the slot in said plate and through the opening in said arm, said bolt when tightened serving to lock said arm to said plate and fix said arm against movement relative to said frame for positioning said scrapers, a lock nut on the threaded end of said bolt adapted when tightened against said arm to hold said bolt in its tightened position, said bolt, when loosened in said arm, being adapted to provide for movement of said arm relative to said frame to provide for movement of said scraper shaft and scrapers, and a lever having an opening adapted to receive the threaded end of said bolt and adapted to be mounted on the latter between said arm and lock nut, whereby when the latter is tightened against said lever movement of the latter shifts said scraper shaft and scrapers,

4. In a disk harrow having a frame, a scraper shaft rockably mounted thereon, and scrapers carried by said shaft, a slotted plate carried by said frame, an arm on said shaft, said arm having a tapped opening therein, a bolt having its threaded end extending through the slot in said plate and through the opening in said arm, said bolt when tightened serving to lock said arm to said plate and adapted when loosened to provide for movement of said scraper shaft and scrapers, within the limits defined by said slot, a scraper shifting lever having means to' receive said bolt, and means including said bolt for fixing said lever to said arm, whereby shifting said lever acts through said arm to rock said scraper shaft, said slot serving to limit the rocking of said scraper shaft by said scraper shifting lever.

5. In a disk harrow including a frame, a gang of disks journaled thereon and a scraper shaft rockably mounted on said frame, an arm fixed to said shaft, a member adapted to be anchored to said frame and extending alongside said armgenerally in the direction in which the portions of said arm adjacent said member move when said shaft is rocked, and connecting means engageable with said arm and member for securing them together in optionally different positions, said member having a notch engaged over a portion of said frame, and said connecting means including an elongated slot in said plate and securing means carried by said arm and extending through the slot in said plate for holding the scraper shaft against movement in either direction relative to said frame and in optionally different positions relative to said frame.

6. In a disk harrow including a frame, a gang of disks journaled thereon and a scraper shaft rockably mounted on said frame, an arm fixed to said shaft, a member adapted to be anchored to said frame and extending alongside said arm generally in the direction in which the portions of said arm adjacent said member move when said shaft is rocked, a scraper shifting lever, connecting means for detachably fixing said lever to said arm, and means on said member having a slot receiving said connecting means, said connecting means being engageable with the ends of said slot for limiting the movement imparted to said arm relative to said frame by said lever.

WILLIAM P. OEHLER. CHARLES H. YOUNGBERG.

References Cited in the file of this patent UNITED STATES PATENTS 

